Can you use Transporter at all? When I've had problems uploading with Xcode I've used it to build the .ipa then uploaded it via Transporter instead.

I'll look into it - thank you for the advice!

What do you do when it's an existing design? I made this app before I knew about UX, and premised the colors on a cute aesthetic, which is part of why users like the app. Adding high contrast was a way to add accessibility but keep the familiar look too, as I fear users will dislike a design change.

I added the high contrast version specifically because the contrast of white on blue is not good, but both it and the images are aesthetic choices. How do you personally decide how to balance aesthetics and accessibility? How can you make room for both?

So far I'm using Codecademy, since I've used them before, but I'm considering other options too - Udemy sounds worth checking out!